SCH-PSB - Differential Pressure Switch for HVAC
Brand: KOBOLD Instruments, IncKOBOLD’s SCH-PSB is an adjustable differential pressure switch for monitoring overpressure, vacuum, and differential pressure of air or other non-combustible, non-aggressive gases in low-pressure HVAC systems. 
The switching pressure may be adjusted without a pressure gauge using a scaled adjustment knob. The switching differential is easily adjusted using a screwdriver.
Features- Monitoring of Air Filters and Ventilators
 - Monitoring Industrial Cooling Air Circuits
 - Overheating Protection for Heater Fans
 - Monitoring Flows in Ventilation Ducts
 - Controlling Air and Fire-Protection Flaps
 - Frost Protection for Heat Exchangers
 
Specifications
Measuring Ranges
- 20 to 300 Pa
 - 50 to 500 Pa
 - 200 to 1000 Pa
 
Maximum Pressure
- 10 kPa (1.45 psi) for All Ranges
 
Media and Ambient Temperature Range
- -4° to 158° F
 
Connections
- Hose Barb